Humminbird 561 - Manual (Page 55)

48 Sonar Menu Tab
Sonar Menu Tab
Press the MENU key twice to access the Main
Menu and then press the RIGHT Cursor key until
the Sonar tab is selected.
NOTE: Menu options can be expanded or simplified by
setting the User Mode to Advanced or Normal. See
Main Menu: User Mode for details.
NOTE: Menu options are determined by your
Humminbird® model. See the following pages for full
menu descriptions.
570 DI
Sonar Menu, Advanced